Re: Spark plug change.
Raise the hood to its full vertical position; the hood latches are staggered so one can release one side before the other. 8-)
The engine's air intake duct needs to be moved out of the way - not removed from the engine. Its secured by two nuts to the top of the motor, a clamp on the air intake and the air mass meter. Use a large blade, long screw driver on that clamp - reach under the front three air intake runners. Unsnap both snaps (top & bottom) between the air mass meter and the air filter's box. Wiggle the two apart - there's a rubber "O" ring that needs to slide between the pieces.
Lift the air duct and air mass meter and fold the whole duct onto the left side of the motor - so the top of the motor is clear. A metric allen wrench is needed to loosen the allen bolts holding the black plastic cover to the top of the motor. Just loosen them DON'T remove them - their length varies - leave them in the cover and lift the cover w/ bolts still in their holes.
Now you'll see the three coils and wires to the other three plugs. The plug wires just pull off with some effort using your fingers. The coils are mounted above the other three spark plugs and are held in place by screws. You must remove the screws to lift the coil from the spark plug.
As you remove the old sparkers note their color - it's a reasonable symptom of the engine's air / fuel ratio. (I found a wet plug indicating a leaking fuel injector.) The new Bosch dual tips are pre gapped so just eye their ground contacts to ensure they are not bent out of place and carefully install them so they don't drop into their tube. Tighten to 19 ft lbs.
Reinstall the coils by first holding them in place and then tightening their hold down screws. The other three wires are simply pushed firmly onto their respective spark plugs. Check everything and replace the black plastic cover, tighten the allen bolts to snug. Replace the air duct - loosely attach it to the air intake, then onto the two studs atop the engine and finally connect it to the air filter box. (Moisten the rubber "O" ring on reassembly.) Check the clamp, top nuts and snap clips.
As a point of interest the coils simultaneously fire both their spark plugs even though one of the two cylinders is 180 degrees from position to use that spark - a moot spark. So three coils serve six cylinders! ;-)
Have fun.
Tom